Mohamed A AbdelrasoulSolar and Geomagnetic Activity Effects on Global Surface Temperatures
Abstract It is a clear fact that the Earth's climate has been changing since the pre-industrial era, especially during the last three decades. This change is generally attributed to two main factors: greenhouse gases (GHGs) &#97;&#110;&#100; solar activity changes. However, these factors are not all-independent. Furthermore, contributions of the above-mentioned factors are still disputed. The aim of this paper is relation in the longer time (1880-2011), between changer of global surface temperature (GST), &#97;&#110;&#100; solar geomagnetic activist represented by sunspot number (Rz) &#97;&#110;&#100; geomagnetic indices (aa , Kp ), &#97;&#110;&#100; to what degree they are connected. The geomagnetics aa are more effective on global surface temperature than solar activity. Furthermore, the global surface temperature are strongly sensitive to the 21.3-yr, 10.6-yr, &#97;&#110;&#100; 5.3-yr variations that observed in the considered geomagnetic &#97;&#110;&#100; sunspot spectra. The present changes in aa geomagnetics may reflect partially some future changes in the global surface temperatures.